21274562 has 8 divisors (see below), whose sum is σ = 31938192. Its totient is φ = 10628500.

The previous prime is 21274553. The next prime is 21274579. The reversal of 21274562 is 26547212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764 + ... + 6567.

It is an arithmetic number, because the mean of its divisors is an integer number (3992274).

Almost surely, 2^21274562 is an apocalyptic number.

21274562 is a deficient number, since it is larger than the sum of its proper divisors (10663630).

21274562 is a wasteful number, since it uses less digits than its factorization.

21274562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8784.

The product of its digits is 6720, while the sum is 29.

The square root of 21274562 is about 4612.4355822060. The cubic root of 21274562 is about 277.0895894618.

The spelling of 21274562 in words is "twenty-one million, two hundred seventy-four thousand, five hundred sixty-two".